Function SerializeExtInstance

python/pyarrow/src/arrow/python/extension_type.cc:38–52

Serialize a Python ExtensionType instance

// Serialize a Python ExtensionType instance
Status SerializeExtInstance(PyObject* type_instance, std::string* out) {
  OwnedRef res(
      cpp_PyObject_CallMethod(type_instance, "__arrow_ext_serialize__", nullptr));
  if (!res) {
    return ConvertPyError();
  }
  if (!PyBytes_Check(res.obj())) {
    return Status::TypeError(
        "__arrow_ext_serialize__ should return bytes object, "
        "got ",
        internal::PyObject_StdStringRepr(res.obj()));
  }
  *out = internal::PyBytes_AsStdString(res.obj());
  return Status::OK();
}

// Deserialize a Python ExtensionType instance
PyObject* DeserializeExtInstance(PyObject* type_class,